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    Université de Fribourg

    Efficient perovskite nanocrystal light-emitting diodes using a benzimidazole-substituted anthracene derivative as the electron transport material

    Kumar, Sudhir ; Marcato, Tommaso ; Vasylevskyi, Serhii I. ; Jagielski, Jakub ; Fromm, Katharina M. ; Shih, Chih-Jen

    In: Journal of Materials Chemistry C, 2019, vol. 7, no. 29, p. 8938–8945

    Colloidal nanocrystals of organic–inorganic hybrid perovskites (OIHPs) are an emerging class of solid-state lighting materials owing to their outstanding photophysical properties. Considerable research efforts have been devoted to the fabrication of high-performance light-emitting diodes (LEDs) based on these materials, including interface engineering which is essential for balancing the...

    Université de Fribourg

    Anion-induced structural diversity of Zn and Cd coordination polymers based on bis-9,10-(pyridine-4-yl)-anthracene, their luminescent properties, and highly efficient sensing of nitro derivatives and herbicides

    Vasylevskyi, Serhii I. ; Bassani, Dario M. ; Fromm, Katharina M.

    In: Inorganic Chemistry, 2019, vol. 58, no. 9, p. 5646–5653

    Luminescent coordination polymers (CPs) of Zn2+ or Cd2+ and bis-9,10-(pyridine-4- yl)-anthracene (BA) show different 1D and 2D topologies depending on the anion used in the precursor. Compounds {[Zn(μ2-BA)(MeOH)2(p-Tos)2]}n (1) and {[Zn(μ2- BA)(MeOH)2(CF3CO2)2]}n (2) form linear structures and {BA@[Zn(μ2-BA) (MeOH)2(H2O)2](CF3SO3)2}n (3) featuring intercalation of uncoordinated BA molecules...

    Université de Fribourg

    Cis- and trans-9,10-di(1H-imidazol-1-yl)-anthracene based coordination polymers of ZnII and CdII: synthesis, crystal structures and luminescence properties

    Vasylevskyi, Serhii I. ; Regeta, Khrystyna ; Ruggi, Albert ; Petoud, Stéphane ; Piguet, Claude ; Fromm, Katharina M.

    In: Dalton Transactions, 2018, vol. 47, no. 2, p. 596–607

    New functional coordination polymers based on the semi-flexible 9,10-di(1H-imidazol- 1-yl)-anthracene ligand (L) with ZnII and CdII, namely {[Zn(μ2-L)2] (ClO4)2·m(MeOH)·n(DCM)}n (1), {[Zn(μ2-L)2](BF4)2·m(MeOH)·n(DCM)}n (2), {[Zn(μ2-L)2(p-Tos)2]·m(DCM)·n(MeOH)}n (3), {[Cd(μ2-L)2(p-Tos)2]·m(DCM)}n (4) {[Cd(μ2-L)2(p-Tos)2]·m(MeOH)·n(Dioxane)}n (5) and {[Zn(μ2-...

    Université de Fribourg

    Formation of silver nanoparticles by electron transfer in peptides and c‐cytochromes

    Vasylevskyi, Serhii I. ; Kracht, Sonja ; Corcosa, Paula ; Fromm, Katharina M. ; Giese, Bernd ; Füeg, Michael

    In: Angewandte Chemie International Edition, 2017, vol. 56, no. 21, p. 5926-5930

    The reduction of Ag⁺ ions to Ag⁰ atoms is a highly endergonic reaction step, only the aggregation to Agn clusters leads to an exergonic process. These elementary chemical reactions play a decisive role if Ag nanoparticles (AgNPs) are generated by electron transfer (ET) reactions to Ag⁺ ions. We studied the formation of AgNPs in peptides by photoinduced ET, and in...